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(a) Ball-and-stick models of the P1 protein structure optimized in the gas phase reported by Rimola and co-workers [168]. Carbon, nitrogen, oxygen and hydrogen were coloured in dark grey, blue, red and white, respectively. (b) Same P1 model as in (a), but with the amino acid residues coloured in white (Gly), red (Glu) and cyan (Lys) to better highlight their position in the folded structure.
